#include<conio.h>
#include<stdio.h>
#include<iostream>
using namespace std;
int main()
{
	int a;
	a = 5;
	a = 6;
	const int b = 5;
	//b = 6; do gan' const nen gia' tri cua b duoc giu nguyen k thay doi
	_getch();
	return 0;
}